Patent US3250763A successfully refreshed from Google Patents.
US3250763A
Expired / Lapsed
US
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Water-insoluble monoazo-dyestuffs
Assignee: Hoechst AG
•
Filing: 1963-06-18
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Granted: 1966-05-10
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Expires: 1983-06-18
Abstract
No abstract record available.
Inventors
- 👤 Gies Helmut
- 👤 Lindner Helmut
- 👤 Siebert Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:39
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/06; C09B29/08; C09B67/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A WATER-INSOLUBLE DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
6 words
A WATER-INSOLUBLE DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
US2083308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |